DICOTYLEDONES— MONOCHLAMYDE^ 



259 



Ovules 1—2. 



Ovule erect . . MyricacecB. 



Ovule pendulous . Platanacecs. 



Ovary 2- or more-celled. 



Seeds few, not winged Buyhorbiacece. 



b. Flowers hermaphrodite. 

 Carpel solitary. 



Ovule erect. Embryo with endosperm and 



perisperm . . Pijperacetz 



Ovule suspended. Embryo with endosperm Chloranthacees. 

 Carpels several. 



Ovule erect. Embryo with endosperm . Saururace^. 

 B. Leaves exstipulate. 



a. Flowers unisexual. 



Ovules very numerous Podostemacem. 



Ovules solitary or very few. 

 Flowers naked. 



Ovary 1-celled . Myricacece. 



Flowers within an involucre. 

 Auther- valves recurved Atherosyermacem. 



Anther-valves slit. 



Embryo on the outside of the albumen . Moniniiacece. 

 Embryo enclosed in the albumen . Euphorhiaceee. 



b. Flowers hermaphrodite. 



Embryo with endosperm Piperzicece. 



Embryo without endosperm . . Podostemacece. 



2. Monochlamydeous Flowers. 



A. Ovary inferior, or partially so. 



a. Leaves stipulate. 



1. Flowers hermaphrodite . Aristolochiacece. 



2. Flowers unisexual . Corylacece. 



b. Leaves exstipulate. 



1. Flowers hermaphrodite. 



Ovary 3 — 6-celled. Ovules numerous . Aristolochiacece. 



Ovary 1-celled. Ovules definite. 



Ovules with a naked nucellus. Leaves op- 

 posite . . LoranthacecB. 

 Ovules with a naked nucellus. Leaves 



alternate . Santalace^. 



Ovules with integuments Chenopodiacece. 



2. Flowers unisexual. 



Amentaceous . . JuglaiidacecB. 



B. Ovary superior. 



a,. Leaves stipulate. 



1. Flowers hermaphrodite. 

 a. Carpel solitary. 



Stipules ochreate . . . Polygonacece. 



Stipules distinct . . , Petiveriacece. 



